ramfs::RamFs::RamFsInodeOps Class Reference

Inode 操作实现类 More...

#include <ramfs.hpp>

Inheritance diagram for ramfs::RamFs::RamFsInodeOps:

Collaboration diagram for ramfs::RamFs::RamFsInodeOps:

Public Member Functions
	RamFsInodeOps (RamFs *fs)
auto	Lookup (vfs::Inode *dir, const char *name) -> Expected< vfs::Inode * > override
	在目录中查找指定名称的 inode
auto	Create (vfs::Inode *dir, const char *name, vfs::FileType type) -> Expected< vfs::Inode * > override
	在目录中创建新文件
auto	Unlink (vfs::Inode *dir, const char *name) -> Expected< void > override
	删除文件（解除链接）
auto	Mkdir (vfs::Inode *dir, const char *name) -> Expected< vfs::Inode * > override
	创建目录
auto	Rmdir (vfs::Inode *dir, const char *name) -> Expected< void > override
	删除目录
Public Member Functions inherited from vfs::InodeOps
	InodeOps ()=default
	InodeOps (const InodeOps &)=delete
	InodeOps (InodeOps &&)=delete
auto	operator= (const InodeOps &) -> InodeOps &=delete
auto	operator= (InodeOps &&) -> InodeOps &=delete
virtual	~InodeOps ()=default

Private Attributes
RamFs *	fs_

Detailed Description

Inode 操作实现类

Definition at line 91 of file ramfs.hpp.

Constructor & Destructor Documentation

RamFsInodeOps()

ramfs::RamFs::RamFsInodeOps::RamFsInodeOps ( RamFs *  fs )

inlineexplicit

Definition at line 93 of file ramfs.hpp.

: fs_(fs) {}

Member Function Documentation

Create()

auto ramfs::RamFs::RamFsInodeOps::Create ( vfs::Inode *  dir, const char *  name, vfs::FileType  type  ) -> Expected< vfs::Inode * >

overridevirtual

在目录中创建新文件

Parameters

dir	父目录 inode
name	文件名
type	文件类型

Returns

Expected<Inode*> 新创建的 inode 或错误

Precondition

dir != nullptr && dir->type == FileType::kDirectory

name != nullptr && strlen(name) > 0

Postcondition

返回的 inode->type == type

Implements vfs::InodeOps.

Definition at line 188 of file ramfs.cpp.

                        {
  if (dir == nullptr || name == nullptr) {
    return std::unexpected(Error(ErrorCode::kInvalidArgument));
  }
 
  if (type != FileType::kRegular && type != FileType::kDirectory) {
    return std::unexpected(Error(ErrorCode::kInvalidArgument));
  }
 
  RamInode* ram_dir = static_cast<RamInode*>(dir->fs_private);
 
  // 分配新 inode
  auto alloc_result = fs_->AllocateInode();
  if (!alloc_result.has_value()) {
    return std::unexpected(alloc_result.error());
  }
 
  Inode* new_inode = alloc_result.value();
  new_inode->type = type;
 
  // 添加到目录
  auto add_result = fs_->AddToDirectory(ram_dir, name, new_inode);
  if (!add_result.has_value()) {
    fs_->FreeInode(new_inode);
    return std::unexpected(add_result.error());
  }
 
  return new_inode;
}

Lookup()

auto ramfs::RamFs::RamFsInodeOps::Lookup ( vfs::Inode *  dir, const char *  name  ) -> Expected< vfs::Inode * >

overridevirtual

在目录中查找指定名称的 inode

Parameters

dir	父目录 inode
name	要查找的文件名

Returns

Expected<Inode*> 找到的 inode 或错误

Precondition

dir != nullptr && dir->type == FileType::kDirectory

name != nullptr && strlen(name) > 0

Implements vfs::InodeOps.

Definition at line 171 of file ramfs.cpp.

                        {
  if (dir == nullptr || name == nullptr) {
    return std::unexpected(Error(ErrorCode::kInvalidArgument));
  }
 
  RamInode* ram_dir = static_cast<RamInode*>(dir->fs_private);
 
  RamDirEntry* entry = fs_->FindInDirectory(ram_dir, name);
 
  if (entry == nullptr) {
    return std::unexpected(Error(ErrorCode::kFsFileNotFound));
  }
 
  return entry->inode;
}

Mkdir()

auto ramfs::RamFs::RamFsInodeOps::Mkdir ( vfs::Inode *  dir, const char *  name  ) -> Expected< vfs::Inode * >

overridevirtual

创建目录

Parameters

dir	父目录 inode
name	目录名

Returns

Expected<Inode*> 新创建的目录 inode 或错误

Precondition

dir != nullptr && dir->type == FileType::kDirectory

name != nullptr && strlen(name) > 0

Postcondition

返回的 inode->type == FileType::kDirectory

Implements vfs::InodeOps.

Definition at line 252 of file ramfs.cpp.

                        {
  // 复用 Create，但指定类型为目录
  return Create(dir, name, FileType::kDirectory);
}

Rmdir()

auto ramfs::RamFs::RamFsInodeOps::Rmdir ( vfs::Inode *  dir, const char *  name  ) -> Expected< void >

overridevirtual

删除目录

Parameters

dir	父目录 inode
name	要删除的目录名

Returns

Expected<void> 成功或错误

Precondition

dir != nullptr && dir->type == FileType::kDirectory

name != nullptr

Implements vfs::InodeOps.

Definition at line 258 of file ramfs.cpp.

                      {
  if (dir == nullptr || name == nullptr) {
    return std::unexpected(Error(ErrorCode::kInvalidArgument));
  }
 
  RamInode* ram_dir = static_cast<RamInode*>(dir->fs_private);
 
  // 查找目标
  RamDirEntry* entry = fs_->FindInDirectory(ram_dir, name);
  if (entry == nullptr) {
    return std::unexpected(Error(ErrorCode::kFsFileNotFound));
  }
 
  // 必须是目录
  if (entry->inode == nullptr || entry->inode->type != FileType::kDirectory) {
    return std::unexpected(Error(ErrorCode::kFsNotADirectory));
  }
 
  // 检查目录是否为空
  RamInode* target = static_cast<RamInode*>(entry->inode->fs_private);
  if (!fs_->IsDirectoryEmpty(target)) {
    return std::unexpected(Error(ErrorCode::kFsNotEmpty));
  }
 
  // 从目录中移除
  auto remove_result = fs_->RemoveFromDirectory(ram_dir, name);
  if (!remove_result.has_value()) {
    return remove_result;
  }
 
  // 释放 inode
  if (entry->inode->link_count == 0) {
    fs_->FreeInode(entry->inode);
  }
 
  return {};
}

Unlink()

auto ramfs::RamFs::RamFsInodeOps::Unlink ( vfs::Inode *  dir, const char *  name  ) -> Expected< void >

overridevirtual

删除文件（解除链接）

Parameters

dir	父目录 inode
name	要删除的文件名

Returns

Expected<void> 成功或错误

Precondition

dir != nullptr && dir->type == FileType::kDirectory

name != nullptr

Implements vfs::InodeOps.

Definition at line 219 of file ramfs.cpp.

                      {
  if (dir == nullptr || name == nullptr) {
    return std::unexpected(Error(ErrorCode::kInvalidArgument));
  }
 
  RamInode* ram_dir = static_cast<RamInode*>(dir->fs_private);
 
  // 查找目标
  RamDirEntry* entry = fs_->FindInDirectory(ram_dir, name);
  if (entry == nullptr) {
    return std::unexpected(Error(ErrorCode::kFsFileNotFound));
  }
 
  // 不能删除目录
  if (entry->inode != nullptr && entry->inode->type == FileType::kDirectory) {
    return std::unexpected(Error(ErrorCode::kFsIsADirectory));
  }
 
  // 从目录中移除
  auto remove_result = fs_->RemoveFromDirectory(ram_dir, name);
  if (!remove_result.has_value()) {
    return remove_result;
  }
 
  // 如果链接计数为 0，释放 inode
  if (entry->inode != nullptr && entry->inode->link_count == 0) {
    fs_->FreeInode(entry->inode);
  }
 
  return {};
}

Member Data Documentation

fs_

RamFs* ramfs::RamFs::RamFsInodeOps::fs_

private

Definition at line 104 of file ramfs.hpp.

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The documentation for this class was generated from the following files:

• /workspaces/SimpleKernel/src/filesystem/ramfs/include/ramfs.hpp
• /workspaces/SimpleKernel/src/filesystem/ramfs/ramfs.cpp